. >> could have come from the environment or concentrated enough to conclude it kwame from the bomb? >> i think they came from the bomb but i cannot be sure. >> how many amputations have you performed and how many more are planned? >> at this point if i have my numbers right, we have performed four amputations and there are two more limb that is are at risk but i hope that we'll save those legs. >> are they in what you would call critical condition or stable? are they in intensive care? >> yes, they are in the intensive care. they're in critical condition. but at this point, we have stabilize their vital signs and hemodynamic situation is under control. >> what are the injuries? can you describe what's placed them in critical condition? >> lower extremity, major injuries. and from these injuries, they bled a lot. we control the bleeding rather rapidly but certainly they lost a lot of blood and caused physiological problems. >> do you have foreign nationals? can you give us an idea about the nationality of the people you are treating? >> as far as i know all of them are americans. >>